Titre du document / Document title
Effects of Dried Distillers' Grain on Fecal Prevalence and Growth of Escherichia coli 0157 in Batch Culture Fermentations from Cattle
Auteur(s) / Author(s)
JACOB M. E. (1) ;
FOX J. T. (1) ;
DROUILLARD J. S. (2) ;
RENTER D. G. (1) ;
NAGARAJA T. G. (1) ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
(1) Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, Kansas 66506, ETATS-UNIS
(2) Department of Animal Sciences and Industry, Kansas State University, Manhattan, Kansas 66506, ETATS-UNIS
Résumé / Abstract
Distillers' grains (DG), a by-product of ethanol production, are fed to cattle. Associations between Escherichia coli 0157 prevalence and feeding of DG were investigated in feedlot cattle (n = 379) given one of three diets: steam-flaked corn (SFC) and 15% corn silage with 0 or 25% dried distillers' grains (DDG) or SFC with 5% corn silage and 25% DDG. Ten fecal samples were collected from each pen weekly for 12 weeks to isolate E. coli 0157. Cattle fed 25% DDG with 5 or 15% silage had a higher (P = 0.01) prevalence of E. coli 0157 than cattle fed a diet without DDG. Batch culture ruminal or fecal microbial fermentations were conducted to evaluate the effect of DDG on E. coli 0157 growth. The first study utilized microbial inocula from steers fed SFC or dry-rolled corn with 0 or 25% DDG and included their diet as the substrate. Ruminal microbial fermentations from steers fed DDG had higher E. coli 0157 contents than ruminal microbial fermentations from steers fed no DDG (P < 0.05) when no substrate was included. Fecal fermentations showed no DDG effect on E. coli 0157 growth. In the second study with DDG as a substrate, ruminal fermentations with 0.5 g DDG had higher (P < 0.01) E. coli 0157 concentrations at 24 h than ruminal fermentations with 0, 1, or 2 g DDG. In fecal fermentations, 2 g DDG resulted in a higher concentration (P < 0.05) at 24 h than 0, 0.5, or 1 g DDG. The results indicate that there is a positive association between DDG and E. coli 0157 in cattle, and the findings should have important ramifications for food safety.
Revue / Journal Title
Applied and environmental microbiology
ISSN
0099-2240
CODEN AEMIDF
Source / Source
2008, vol. 74, n
o1, pp. 38-43 [6 page(s) (article)] (41 ref.)
Langue / Language
Anglais
Editeur / Publisher
American Society for Microbiology, Washington, DC, ETATS-UNIS
(1976)
(Revue)
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Localisation / Location
INIST-CNRS, Cote INIST : 7195, 35400018301011.0030
Nº notice refdoc (ud4) : 20246585
